The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-578-2245, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-578-2245 |
| Primary Part Number | AES18U250625EA2A11 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES NOMINAL IN |
| Head Height | 0.132 INCHES NOMINAL IN |
| Fastener Length | 0.757 INCHES NOMINAL IN |
| Thread Length | 0.625 INCHES NOMINAL IN |
| Supplementary Features | THE SCREW IS PART OF: 1010-01-573-1631 VARIABLE SLEW RATE CONTROLLER KIT (VSRC) |
| Material Document and Classification | ASTM F 879,ALLOY GROUP 1,CONDITION AF ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.437 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AES18U250625EA2A11 PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| ASME B18.3-2003 | 5/1 Secondary reference The American Society of Mechanical Engineers |
| ASME B18.24-2004 | 5/1 Secondary reference The American Society of Mechanical Engineers |
NSN 5305-01-578-2245 is a Screw,cap,socket Head, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-578-2245 has 1 manufacturer part number on file: AES18U250625EA2A11 (The American Society of Mechanical Engineers).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-578-2258. Verify interchangeability with system specifications before substitution.
Key specifications for AES18U250625EA2A11: Width Across Flats: 0.156 INCHES NOMINAL IN; Head Height: 0.132 INCHES NOMINAL IN; Fastener Length: 0.757 INCHES NOMINAL IN; Thread Length: 0.625 INCHES NOMINAL IN. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.